Having had a coat of gloss varnish, which in left to harden for 24 hours or so, I set about lining today.
I know it's cheating, but I don't think metallic gold paint scales nicely. I chose Humbrol 94, which is a sort of pale yellow ochre. With hindsight, 63 might have been better, as the shade I've used is almost exactly the same as the GWR cream. Go figure.
Here's the brake third. Because this, along with the full brake, had been built and stripped of bad paint, there were some surface finish issues. Despite some rubbing down and careful priming there are still glue blobs and various marks which catch the bow pen as you run it along the panelling. One thing I have learned is you can never get it spot on with the pen. You always need to tidy things up with a brush, some thinners and a cocktail stick. You might just be able to make out some marks on the brake end lower panels. I hadn't spotted some grollies, and I've had to rub down post-varnish. I'll give that some careful brushwork before the lettering gets done, and then it can all be levelled off with a satin varnish.
The full brake is beginning to look a bit tidier. Those lookouts are a right royal pain the a**e to line round! especially if the builder has overdone the solvent cement and let the panelling start to dissolve…
Finally, the compo. I've made a start with painting interior panels. I'm not sure of the exact shades I should be using, but it felt about right. I may dry brush a little grain on, with a satin varnish topcoat, but then again I may not. I plan to use real glass for the windows. After all the effort with the livery would be spoiled by using the rather scruffy plastiglaze stuff.
Smoking compartments: I can't see much evidence for dedicated compartments for these vehicles. I guess they assumed that everyone and their dog puffed like chimneys and didn't bother to assign one.